EP 0186707 B1 19900228 - UPWARD TRACING SYSTEM
Title (en)
UPWARD TRACING SYSTEM
Publication
Application
Priority
JP 10412084 A 19840523
Abstract (en)
[origin: US4654570A] PCT No. PCT/JP85/00282 Sec. 371 Date Jan. 21, 1986 Sec. 102(e) Date Jan. 21, 1986 PCT Filed May 22, 1985 PCT Pub. No. WO85/05308 PCT Pub. Date Dec. 5, 1985.A tracing system which ensures clamping only a downward feed of a tracer head (TR), thereby preventing a cutter (CT) from being broken. Clamping of the feed of the tracer head (TR) in the direction of cutting is ensured, by the provision of machine position sensing circuitry (PCZ, CNTZ) for sensing the machine position in a vertical axis (the Z-axis), and initializing circuit (CPU) for setting a predetermined value alpha in a vertical displacement storage devict (REG) at the start of tracing. An adding circuit (CPU) reads out the results of sensing by the machine position sensing circuitry for each predetermined period and adds the difference between the current and the preceding results of sensing to the vertical displacement storage device (REG). An update circuit (CPU) sets the predetermined value alpha in the storage device (REG) when its contents reach a predetermined value beta and circuitry (CPU, GC, CLP) for stopping the feed of the tracer head in the vertical axis and for performing a clamp feed of the tracer head when the contents of the vertical displacement storage device (REG) go down below a predetermined value gamma .
IPC 1-7
IPC 8 full level
B23Q 33/00 (2006.01); B23Q 35/12 (2006.01); B23Q 35/123 (2006.01)
CPC (source: EP US)
B23Q 35/123 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 4654570 A 19870331; DE 3576135 D1 19900405; EP 0186707 A1 19860709; EP 0186707 A4 19871208; EP 0186707 B1 19900228; JP H0155942 B2 19891128; JP S60249555 A 19851210; WO 8505308 A1 19851205
DOCDB simple family (application)
US 82350086 A 19860121; DE 3576135 T 19850522; EP 85902640 A 19850522; JP 10412084 A 19840523; JP 8500282 W 19850522